Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income Includes Changes in Unrealized Gains and Losses on Available for Sale and Other Invested Assets (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning of period, Before	$ 210,521	$ 58,522	$ (15,303)
Change in unrealized gains (losses), net, on investments available for sale, Before	(166,208)	176,920	62,540
Change in unrealized gains (losses), net, on interest rate swap, Before	(14,343)	(24,921)	11,285
Effect on other comprehensive income (loss), Before	(180,551)	151,999	73,825
Accumulated other comprehensive income, end of period, Before	29,970	210,521	58,522
Accumulated other comprehensive income, beginning of period, Income Tax	71,580	19,900	(5,201)
Change in unrealized gains (losses), net, on investments available for sale, Income Tax	(56,513)	60,154	21,264
Change in unrealized gains (losses), net, on interest rate swap, Income Tax	(4,877)	(8,474)	3,837
Effect on other comprehensive income (loss), Income Tax	(61,390)	51,680	25,101
Accumulated other comprehensive income, end of period, Income Tax	10,190	71,580	19,900
Accumulated other comprehensive income, beginning of period, Net	138,941	38,622	(10,102)
Change in unrealized gains (losses), net, on investments available for sale, Net	(109,695)	116,766	41,276
Conversion of Held-to-Maturity to Available-for-Sale, Net			21,630
Change in unrealized gains (losses), net, on interest rate swap, Net	(9,466)	(16,447)	7,448
Total other comprehensive (loss) income	(119,161)	100,319	48,724
Accumulated other comprehensive income, end of period, Net	19,780	138,941	38,622
Accumulated Unrealized Gains Net On Investments Available For Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning of period, Before	251,796	74,876	12,336
Change in unrealized gains (losses), net, on investments available for sale, Before	(166,208)	217,225	16,364
Conversion of Held-to-Maturity to Available-for-Sale, Before			63,617
Change in unrealized gains (losses), net, on interest rate swap, Before		(40,305)	(17,441)
Effect on other comprehensive income (loss), Before	(166,208)	176,920	62,540
Accumulated other comprehensive income, end of period, Before	85,588	251,796	74,876
Accumulated other comprehensive income, beginning of period, Income Tax	85,614	25,460	4,196
Change in unrealized gains (losses), net, on investments available for sale, Income Tax	(56,513)	73,856	5,564
Conversion of Held-to-Maturity to Available-for-Sale, Income Tax			21,630
Change in unrealized gains (losses), net, on interest rate swap, Income Tax		(13,702)	(5,930)
Effect on other comprehensive income (loss), Income Tax	(56,513)	60,154	21,264
Accumulated other comprehensive income, end of period, Income Tax	29,101	85,614	25,460
Accumulated other comprehensive income, beginning of period, Net	166,182	49,416	8,140
Change in unrealized gains (losses), net, on investments available for sale, Net	(109,695)	143,369	10,800
Conversion of Held-to-Maturity to Available-for-Sale, Net			41,987
Change in unrealized gains (losses), net, on interest rate swap, Net		(26,603)	(11,511)
Total other comprehensive (loss) income	(109,695)	116,766	41,276
Accumulated other comprehensive income, end of period, Net	56,487	166,182	49,416
Accumulated Unrealized Gains Losses Net On Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning of period, Before	(41,275)	(16,354)	(27,639)
Change in unrealized gains (losses), net, on investments available for sale, Before	(14,343)	(30,821)	11,285
Change in unrealized gains (losses), net, on interest rate swap, Before		5,900
Effect on other comprehensive income (loss), Before	(14,343)	(24,921)	11,285
Accumulated other comprehensive income, end of period, Before	(55,618)	(41,275)	(16,354)
Accumulated other comprehensive income, beginning of period, Income Tax	(14,034)	(5,560)	(9,397)
Change in unrealized gains (losses), net, on investments available for sale, Income Tax	(4,877)	(10,479)	3,837
Change in unrealized gains (losses), net, on interest rate swap, Income Tax		2,005
Effect on other comprehensive income (loss), Income Tax	(4,877)	(8,474)	3,837
Accumulated other comprehensive income, end of period, Income Tax	(18,911)	(14,034)	(5,560)
Accumulated other comprehensive income, beginning of period, Net	(27,241)	(10,794)	(18,242)
Change in unrealized gains (losses), net, on investments available for sale, Net	(9,466)	(20,342)	7,448
Change in unrealized gains (losses), net, on interest rate swap, Net		3,895
Total other comprehensive (loss) income	(9,466)	(16,447)	7,448
Accumulated other comprehensive income, end of period, Net	$ (36,707)	$ (27,241)	$ (10,794)